Value Collection -33717-5 Hex Socket Cap Screw 1-8 Unc

Product Description

The VALUE COLLECTION -33717-5 is a partially threaded hex socket cap screw engineered for high-strength fastening applications in industrial, mechanical, and structural assemblies. It features a 1-8 UNC thread size and measures 5 inches in length under the head. Drive engagement is via a 3/4 inch internal hex socket, requiring a standard Allen or hex key of matching size. The fastener is machined from alloy steel and finished with a black oxide coating that provides moderate corrosion resistance and reduces light reflection on exposed hardware. Installation is straightforward and repeatable, making this screw a dependable choice for maintenance, OEM production, and field repair work.

This cap screw is suited for heavy-duty bolted connections where a recessed drive head is required to sit flush or below the mating surface. Partial threading allows the unthreaded shank to act as a shoulder or alignment feature in close-tolerance bores. Typical applications include machine bases, fixture plates, equipment frames, and structural brackets across industrial and commercial settings. Trade professionals including millwrights, machinists, pipefitters, and general maintenance technicians commonly use this fastener type in high-load assembly work.

Key Features

• 1-8 UNC thread form for coarse-thread engagement in standard tapped holes
• 5 inches length under head with partial threading for shank-guided alignment
• 3/4 inch hex socket drive for high-torque installation with standard hex tooling
• Alloy steel construction provides high tensile strength suitable for demanding load conditions
• Black oxide finish offers mild corrosion resistance and a low-reflectance appearance
• Meets ASME/ANSI B18.3 and ASTM A574 fastener standards

Compatibility

Designed as a standard-dimension hex socket cap screw conforming to ASME/ANSI B18.3 and ASTM A574, compatible with any tapped 1-8 UNC hole requiring a partially threaded socket head cap screw with a 3/4 inch hex drive.

Installation Notes

Installation should be performed by a qualified mechanic or maintenance technician using a properly sized 3/4 inch hex key or Allen driver. Verify the receiving tapped hole is clean, undamaged, and dimensioned to 1-8 UNC before installation. Apply appropriate thread lubricant or threadlocker per the assembly specification, and torque to the value specified by the equipment manufacturer or applicable engineering standard. Do not exceed the rated tensile strength of the fastener by over-torquing.